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CVE-2026-64897 Microsoft CVE debrief

Microsoft SharePoint Server Spoofing Vulnerability debrief. This vulnerability allows an authorized attacker to perform spoofing over a network. SharePoint administrators should review and apply Microsoft's patch, verify SharePoint Server versions and configurations, and monitor for suspicious activity. The vulnerability is a spoofing vulnerability in Microsoft SharePoint Server. An authorized attacker can perform spoofing over a network. Microsoft has released a patch for the vulnerability.

Vendor
Microsoft
Product
Microsoft SharePoint Enterprise Server 2016
CVSS
MEDIUM 4.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-10-08
Advisory published
2026-08-11
Advisory updated
2026-10-08

Who should care

SharePoint administrators and users who have deployed Microsoft SharePoint Server in their environments should be aware of this vulnerability and take necessary actions to mitigate it. SharePoint administrators should review and apply Microsoft's patch, verify SharePoint Server versions and configurations, and monitor for suspicious activity.

Why it matters

The vulnerability allows an authorized attacker to perform spoofing over a network. SharePoint administrators should review and apply Microsoft's patch, verify SharePoint Server versions and configurations, and monitor for suspicious activity.

  • Verify patch application to prevent spoofing
  • Monitor for suspicious activity
  • Review SharePoint Server configurations

Technical summary

The vulnerability is a spoofing vulnerability in Microsoft SharePoint Server. An authorized attacker can perform spoofing over a network. This vulnerability allows an authorized attacker to perform spoofing over a network. SharePoint administrators should review and apply Microsoft's patch, verify SharePoint Server versions and configurations, and monitor for suspicious activity.

Defensive priority

Medium priority for SharePoint administrators

Recommended defensive actions

  • Review and apply Microsoft's patch for the vulnerability
  • Verify SharePoint Server versions and configurations
  • Monitor for suspicious activity

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. Microsoft has released a patch for the vulnerability. The vulnerability is a spoofing vulnerability in Microsoft SharePoint Server. An authorized attacker can perform spoofing over a network. SharePoint administrators should review and apply Microsoft's patch, verify SharePoint Server versions and configurations, and monitor for suspicious activity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-64897 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-64897

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-64897 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-64897

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Microsoft SharePoint Server Spoofing Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/64xxx/CVE-2026-64897.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64897

    Supplemental source - vendor-advisory, patch

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.